October 10, 2015
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Definition of Hay fever

Hay fever: A seasonal allergy to airborne particles characterized by itchy eyes, runny nose, nasal congestion, sneezing, itchy throat, and excess mucus.

Hay fever is a misnomer because it is not caused by hay and it does not produce a fever. It is also known as allergic rhinitis or pollinosis.

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 8/28/2013

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